SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c975fd59f28ebc62551a217daa3fdcf00b2a5a34e98e2a63a84dfdd298e4bc77' 
  AND token = 'o+l7EBHOGShsAxkZwK3/0BjMPUC+7XcYashe5GA5qo0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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