SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dd8a14f62ee9bd45f3fe378428f0b8dac1e14c10c9d791384733b39643f2aac' 
  AND token = 'yYJkU7CIfK9v53AnjUgIpEQKKzsoPPqOx8J/JSDHji0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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