Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dc45bb2e532f896a22415c6e51e058715e503360a5cb831f5327890191ed824' 
  AND token = 'FP9mmP2eQDFvj9aFXgJI2emierwA3IClfJ2mYyA5Q7Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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