Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05f5aea4fea5cfb7c393d86a0b2df51ab229bfaf29c16951ac774da1c7c0346c' 
  AND token = 'iGC4+Nc0zVYKoVPY+c+7mMAMwHpoQGZmd8m91rgHiTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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