Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '260f4490d44cdd06ed49929ff0b7bf25d8092794d468ba3adbb36bc4d194d422' 
  AND token = '6LZnVAG6+fs1hy5eCAZhMX7lbES3zN9jGbm5wMgBORk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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