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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60a311080ffd24ff6c0d0c29c43871cc3243cce4c6af4c7b8e07f0984099eb05' 
  AND token = 'WGvNep7JsCgaGG/O/a8em8tMGA0ldUQZw25Vl1EIz+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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