Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '3b9684da9307379197d395a3d123af5fca1fbc1ee4880dcfc7cf936da9d07d31' 
  AND token = 'cP08grmSskCC8p5bylLRKLJ6Nyh9ripMHohFpLjT33Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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