SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24229d0e721f39c0489b33de6acbc20d46efb661dd87673586fdde9c08f6dc90' 
  AND token = 'uVyTvEFYPGLi48AvvhkZQVUoJNZ4o+/L/r95ry5StWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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