SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '237981f6c9103326aadf918b6d4babd45fffde008e35761b13548bd810cf8029' 
  AND token = 'Yr//epiVRR0XKMnIP9YOe8sTMl5WPQg/Jpy3+zsG+ZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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