Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3ff4c25dbab8df077b4f7e3b85b31e3e6dbee133136c8d1940b3670ce235b1c' 
  AND token = 'dD9O5FtLTxOWjjamIVfGKjTtkrQnMPoIrmrrY8bl934=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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