SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c469fd675af954cea637b792fc4420edc9131d022dbc38c1846130037beb2ba6' 
  AND token = 'X/FOQPLn6kIl10GGBjwcUHVXvTe1hKUFMzZ2SWtHkSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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