Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea5e456488f0a462d9b9a39937b705369b81912499968ea97009ccb7c75f90ef' 
  AND token = 'mF7HytQ0r+8QBAdwWUl55xtjRf8E4XRMU1DWSJJluG0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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