Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bf3d51f81172af5070869a6c7cc6a3d2440941821e44b5fd6ca287f9744f6dd4' 
  AND token = 'oyqUUaxEBurJQOe8DbgBRoixpbENHc+baRyc0tL8T0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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