Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b89e7e66492e2025a0b62fe7cb2f7f9b4b7a7728db490e9967efb7fded84bb52' 
  AND token = '7qvIcWbwMvyaHVZkyQrjFQCX89VaMUliV7ELs3CdzHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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