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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf8c55e6044593fe9b3fa09c863876c62b7044577052a54967fc92b7a2c5e98e' 
  AND token = 'APbmbg/MVZ5TfmI/755Lc3g/p3sJlRWOxR5IodcnmJI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00091

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}