Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f44cd5698ecd2344b7e5beeb11f1baaa190d0b8e8d2b45e0647e7e50e000828' 
  AND token = '7FriFa6zWh9XNo3GSJqISGCEt36oVq7G/oyL4T8ocyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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