Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91844bffe529a3db1981fdbe7cde681533c8f610df8ea51f4ed9e028f9378a5d' 
  AND token = 'D9IxhwNkH9/XSndcbE8n+4ee/N9SHpSJBnb/f5TINlI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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