Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd18a1ba27c241894ca88035f86760bb2c451ca31db2f705baa92d667f1ca2cf' 
  AND token = 'weKo+oMltxAwzllf+a0u0+uAkar0wssTi/BenJdmbNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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