Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c20aa0cf5d69a2e31f5131fe59c43b65cc89e7307a6b8c288ef044ff9463c745' 
  AND token = 'cQI7p/kuOci6xQZ6+i1kKd8D8wvKmWuvDp+D5zCNcjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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