Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3574eb9115f746e1c403b37655ff218f482510359ef4ca24e29d40fb9893d695' 
  AND token = 'HmOg1PoNbBnf4sOP7t7hOfMajDQQDavJSOxCTh8XX3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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