Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f468968976f523896aeba89f95d3cf68ed9f167fc2f4d8121191ceb846a414cf' 
  AND token = 'nanRPydoxZT72GLsCCsGkQxYEvrBoAB/y6KQd/6b2SQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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