Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1947b44cbc5e35a807fc0c1adf0c4552552a5a16152dfe24553a73c7a3602b76' 
  AND token = 'fyXG/OnCF+UM/GQVC6KNRbE5kDCOfm6q9KnyueGq1tY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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