Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b54cb9efc80d16f4bf30926825ce6471957eb37a7307586781c8ce052e0067ec' 
  AND token = '9i6O0oHaQ6FgXUSMmm/omJrjHs+hXC83QabBKVR+cEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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