Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '7b1d4386abb70df115c662c0d26d4c3a6039b06c44569c440b057b9fe10ba786' 
  AND token = 'Fb2hLUmn/i+ErLrRX9GROsRir9V1gdFmZhyeGT5WNoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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