SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e011c1e084d3790df3c42303dfaad157bfa43c244b2f94627c370f00f1d10d78' 
  AND token = 'BgNyFcdsvY/zRzc5CYPwttNIBqW96qnNhoNjDEjsJ1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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