Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfdce7dfb0053f084c04254f8601f53f3df6a56401f5f416088a05d5251ed62f' 
  AND token = 'Oh4fhepxvao19YO07tAd3iTJgcsifP+9LxfZvSqPV+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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