Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cb90eb7b3ce8e4c71ef34ff2eb126675037727e4ba2724527ef0126265819350' 
  AND token = '7bn5CD/957VlpSyP9UZX4bNyA7+RDszBE18hqkOsSj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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