Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2e01c2a9bb5c5d2165aa3f7aacac7039dff3397a75213a09f19c38726b00b9ad' 
  AND token = 'zKb1U2FdSwIbb3fPqXJx9EF1zrHsyNy9wkYk60p4mr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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