Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c31d9d5640f6af11670b54de2bcca341fdb29397934bddc17f2b7955f8d7dc8' 
  AND token = 'HX9U4DZ9aOOS43kz41GRW2AyUgF7mjL1JgsRgp20mTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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