Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0063bba9dc53892d8748596e22f76609e4eb6eae8e35ba2ced8714fafc85506' 
  AND token = 'h0AkNpBVjOmtq50Yyby1OhV1tqZ1kyhJtoSG7Ka4aTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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