Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3af613259352a7002e930be6c4c70f35876e45f94768c716adc208f5f1983ee2' 
  AND token = 'W00VzeRAf2cksTTHV9M6avjwymw7l5E0SXHQ6Ws7r3s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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