Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45d9e4340df1b2fb07d3632acb2f0ec4b2cff678950c87941ecb83173d2289d0' 
  AND token = '702hmIXFsZFdLs3NHSEhNSRYu0HA5uYg8BSiFaqw4ks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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