Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b96d120b36c54f1cf1a67dcf7d352985874b259c80eeb94f540419ca5859006a' 
  AND token = 'd6EN6oL2kCwZDI1jrasREdQ7PbClJoJQyR7BNgqRg8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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