Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cb969b7ac6a38dac8322cad884067707772e57e26506afc25572f1d07b01f2b' 
  AND token = '6c/tSthshOOTklCATrHg+HgEa53NdnDnL93s4s1oldg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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