SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abacd891bd19ce20005c1e7adad291985e73befd375ca4125b431584c63e64f9' 
  AND token = 'B/5aEE7nWq+z4tOcFTKTVF8rF2EXqDNAh3WfpETwAiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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