Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c030eeca2341aa1549b9594aebe7f23251dcf5fceab8c8da1ebf1df57e932222' 
  AND token = 'UfJRyqcDWsGjfqc4VXhE+eeGAMovyCh3O0OcK0+KNFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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