SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e225fde95ac660209ca6e0b96b75d7559131c39082fc51261bad6a9d9f117bf' 
  AND token = 'wiYy+E4FqpMhywgxC/R+kBsAwQJGgDvXq7LiQrFaSeU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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