Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0666ecd0cdeb03c4c0b6fda7be4ff706b50083db3872c9de8ad5d5c7c7313bc1' 
  AND token = 'OqepdqqpvCAAkYqBMkIOokgWwqe9zFqLEmatlDOEDPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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