Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e966f068eeef74e79c4ed3f6aa4adb7b8131bef4a80e5f32adaad8fd3d0889ef' 
  AND token = 'hdtQY7ZD6vSJysh4FjjQ5D1nDiDp5hmGf1YZb1sOkIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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