Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed80f20fb1a5ab0a477bd9e00fdf3e38f3d1244670729be8e1497c26d010bfdc' 
  AND token = 'OPqd38JMWSVz/c8w3UMDdEJ5pRthGfOZxfzeUcCebiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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