Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62624b6116bb21fb3c20a74cb43c87a7e2a8d6d42bce698446948780c8758769' 
  AND token = '5u/pOMSupa7wCfed2MitnhRNWnHu/ud+rtJv6TlJIWQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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