Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efad7496f737db664f88556b76d5c0e7527f18dc4bd1a319c09f24becf63204f' 
  AND token = 'kk6B8ltKqoYEYVbvqsPnCRyvW2I0RTEcuJ3FMVIHaNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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