Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b8c6a64f565362813583baf2eddb22abe058690d83d0029cf48d9d87a00ee0b' 
  AND token = 'dfELmBL4UJCTJULSxlEZJmYkP4f/US69ugOA3CHxX9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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