SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bafe2d181e023023f6770e152ac334194e901f94da56b6ff4d72d9180c76506' 
  AND token = 'TKWZAFhKCYHdGji2wFPC4awQ5Ez0SDJSwmpt55/FngQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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