Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13677d64db0fb5a4eaa404c74148d0a505e0eec29094748202bf870a2c0e86e0' 
  AND token = '7etT07aNHIwy/DVlmNDzD4RNoK4KNQhb9xPdxuPufYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}