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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae267f78ec34912bb6bde38f03573d7eef367819003c43cab5b3d742f2af5ef8' 
  AND token = 'e8+UHHiXuaP7aJ0N5MPwDn++F+IF5G6+UrC6Ciaz3c0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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