SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5cd237d3b16c19903ff8cfac42c8183839772687f95d8f4fedfa584cab4982c1' 
  AND token = 'IVDVqoG+N8aRvnQjLjNsyYxybxokeiOx1a5p7GJhges=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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