Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c4af35b77e93579b63df068ac237d372cd1d59e5ad026b0ab9e164b38e7bb02a' 
  AND token = 'tlVjOdHJuSwFZunI+wA29n5z8e8pb7wfFo+jzcAWJmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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