Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '8d119e3f8afb68943a0cc3d89c9aada422c4bd510f9e3ace6922b1985ac66197' 
  AND token = 'GqzuBkFvElzQW2xqnEm7eLFofLnAn9UNMvyzZY7kU3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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