SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1a07a0dd60028d9d0128787e26b80b732147fb4c0b5a658aafb34dc2f56f0958' 
  AND token = 'ymDwxBMHKjw6c91h9Y1yJv1VShZhMV0N9vPRFjdZK2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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