Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '50587946b7b48c525a7233e7be1fb8ffd99945a636859a7cf1e9fc7dc0460a11' 
  AND token = 'ta1L8YXsuOinvhMPyqFdLUqdEk2E+IN8Di3YmxdqF0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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