Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b55c77bb25480ad222037202e427deb248e3ddb22a1d88c88cc4a6535bd840b0' 
  AND token = 'P/WWWObQGkfonlb6tVYIvUErl7VNc0HvXuVBrLz33fU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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