Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c2489621a16ec3c7cb0df907faf761611fbfbc3602abdc009b8e64fe506e5af6' 
  AND token = '6Gb5FmIjqQODb1Pc/+LEX+YJmAfLkmms53Mme6Y6Ryg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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