Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6adaa477f8e80eac64150ff5223fc0e31d78aa0ccc8f7fe83b18116cc02a7306' 
  AND token = 'bp/zSV+RkckG1YVnNxBB2TELSjNqy1pKjzMpnl0j2cc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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