Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6fd51cb3625beae963ea6e60b9622a7cd64200fc46ae0704f37f491475d1f92c' 
  AND token = '1MDGSXEmpUZ77QV6Va3oK/bBWa//flu5nBbarqPyp6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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