Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61c4cee90f6a7415a9110f6e0a8dcd4482e338b05f9ebfc92c6613afadeb956b' 
  AND token = '4oYqTF8vipI1C4rZCTFqd4SHlGEQbce4DeuG6PKopoQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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