Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '372e12ba56cdaef77ad9f426ac565e3e621e81218e2a782b4a12c4b9720ea9fd' 
  AND token = 'hb65hrRRMGwXBo/wXtRsY9fCCEnyW2vyG1Fwr4ZJPXg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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