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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e5b66a85d650d695e29fba625cc9b5618d7313a3c9ba39141c35b6d31544963' 
  AND token = '14orkno/IOdwx/Rbq8oIgZqaucAPB+LXSAdHX+fvQW4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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