Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b55e940ee9c80739f71b9e714bf258e7beffeee8d288cfc144c2a2c22be9b17' 
  AND token = '6uj4XlaVt9KSf7iOIBk/mHYeXbgkC4TcooOxRLEXJJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}