Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15aed99879ad3521d225f274bbad35339fcd216bff129a06a9d515c1ac5dbcce' 
  AND token = 'h95vHxGKRn0WtBW7AARJUPG8K5jrdLG2JcdfFVBocXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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