Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c4cd5a82bc2e82ea218a201728dc3129eaab3e66af54b77b4ca9020c588bd5b' 
  AND token = '3AxpiKd10ZCSedkkIOfGhTUkINXdm0E+SKcFNi5eAT4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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