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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f2e33133ba349621246381db882fcbcb12c15a8852c8c5e820eaf9136f6b2c5' 
  AND token = 'Gh03oCwjfKU0lpXjSDkQ31dSxvwz57nd0ptYqU5NZYc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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