Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fabe4a87fb83bc3531afef5a94158e8da871e87450e50f82ff42b087a0377832' 
  AND token = 'dRTzOwH+mIO1D1aoySsbg01Vss/Gl9o+EUutIOfxK3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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