Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ba4ca5767c5ac88ca13aaeabe4cc27258eb36815fc1fffd6382349347817df6' 
  AND token = 'QZVH+Nsulpji2d7iD3Mem9OOsKnint3nU1daTzUFxrQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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