SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2a543b9de12a36a39c9e84ff3c6de2095c4609dac43b18204bf4ca6b73b26ef' 
  AND token = 'qVNwhRz0HHgGcxTX9jYCvxjs1FBsYo3YJaJ1xaYbxlQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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