Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ec60404a22676be429e67e1fcba5bb47ba60b0dfc97227a61fac33b08c8cae6e' 
  AND token = 'r3NISeGgnoNJmvB1LuOmv0m6aNTwlCuUsc6LCpolf+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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