Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '628f2ef2c66dc4387bc63be4306eda76bb328b18d337e0277278dacee3bc046b' 
  AND token = 'qRt/SSRk+yrJ5+9EQQqXsB0lJwdLYiaoTqYkkemWGiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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