Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e81223eb6c108d17beb64479e7fd44904baf7140a1a2934a682aafbb5f8fe605' 
  AND token = 'ZD4tzlIra50Kc7SMb5t6hHz+pCt3g9hm1cQL6yajJ6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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