Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db7bec4698fcd8c5d3394b57d131d53c4559f1d0a3258bad2dffb1ab20cfff82' 
  AND token = 'SK62JvJ5nAdE+PloDgEcIE9lwz4k56ysFLMqYzREWkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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