Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4df6b4c3168ff6ee30edd680b4e57de53ef3a5fbe6656f2a88e32faf9be3637a' 
  AND token = '0ZMbqWLkFLdg3mwi1ALdzhk8v1mjsafH8ru7Mmpu1xo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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