Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8b1fc806c082942ffaef4bd433c352d6ca0084960dcc0632055d0926f16094b5' 
  AND token = 'tMe0LM6C0J0FG9+d6PXRe90Lnls63Tifuq3ZkD9bAeg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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