Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03ea0a30f8d14ea2f674e54f6b49c6e2b29427fbfe5f20372d295b646ec0b27b' 
  AND token = 'pgzCXXUfUxiCvdUHdm61ClxrD8U6linljb4aQFG+HdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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