Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '982bebdf13b67337e08e0af0a518f9483dc36818d51052a627b025954d5b62bf' 
  AND token = 'bFS5nIMdxGLIKSM0zghC6sGA5TocgtyC+YLWW3WaHDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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