Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e7f6ea5bf9291669d54a6a8d00731d7444832b5031eff0f67db76c396eb7c7c' 
  AND token = 'y0s0hYhk743Bthl7wYUPDFieSscxIazMRyr2FqXjBHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}