Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '760c354aaee236ac405ccfab5cf335935a3818fefc9ff378dfbf9383ab0dfa64' 
  AND token = '+fUtIz1Fjzejxi4QFl18mHWwqJ0DE5PGchdnn5sb/XQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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