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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a0010757fb034d7c692076f18098a3622ec434df1533f5a3c38a87c8879f5804' 
  AND token = '61O8dHX1Xl9gTRz+DZM+e2+yUko8SVzA/wr5RcIzrow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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