Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8949b2d7f8becc6a38a69fe93256d14bb7e8d3e39181b69b83bc8b50e6662f5e' 
  AND token = 'eInyHbGXdnp3LzJOuP5ghhjmiCuqNjrmY3unznpxDdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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